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bash-4.2 stray file cleanup

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Chet Ramey
2011-12-12 22:36:21 -05:00
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CHANGES-4.0-beta2
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This document details the changes between this version, bash-4.0-beta2,
and the previous version, bash-4.0-alpha.
1. Changes to Bash
a. Fixed a bug that caused failed word expansions to set $? but not
PIPESTATUS.
b. Changed filename completion to quote the tilde in a filename with a
leading tilde that exists in the current directory.
c. Fixed a bug that caused a file descriptor leak when performing
redirections attached to a compound command.
d. Fixed a bug that caused expansions of $@ and $* to not exit the shell if
the -u option was enabled and there were no posititional parameters.
e. Fixed a bug that resulted in bash not terminating immediately if a
terminating signal was received while performing output.
f. Fixed a bug that caused the shell to crash after creating 256 process
substitutions during word completion.
2. Changes to Readline
a. Fixed a bug that caused redisplay errors when using prompts with invisible
characters and numeric arguments to a command in a multibyte locale.
b. Fixed a bug that caused redisplay errors when using prompts with invisible
characters spanning more than two physical screen lines.
------------------------------------------------------------------------------
CHANGES-4.1
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This document details the changes between this version, bash-4.1-alpha,
and the previous version, bash-4.0-release.
1. Changes to Bash
a. Fixed bugs in the parser involving new parsing of the commands contained
in command substitution when the substitution is read.
b. Fixed a bug that caused the shell to dump core when performing programmable
completion using a shell function.
c. Fixed a bug in `mapfile' that caused it to invoke callbacks at the wrong
time.
d. Fixed a bug that caused the shell to dump core when listing jobs in the
`exit' builtin.
e. Fixed several bugs encountered when reading subscripts in associative
array assignments and expansions.
f. Fixed a bug that under some circumstances caused an associative array to
be converted to an indexed array.
g. Fixed a bug that caused syntax errors and SIGINT interrupts to not set
$? to a value > 128.
h. Fixed a bug that caused the shell to remove FIFOs associated with process
substitution inside shell functions.
i. Fixed a bug that caused terminal attributes to not be reset when the
`read' builtin timed out.
j. Fixed a bug in brace expansion that caused unwanted zero padding of the
expanded terms.
k. Fixed a bug that prevented the |& construct from working as intended when
used with a simple command with additional redirections.
l. Fixed a bug with the case statment ;& terminator that caused the shell to
dereference a NULL pointer.
m. Fixed a bug that caused assignment statements or redirections preceding
a simple command name to inhibit alias expansion.
n. Fixed the behavior of `set -u' to conform to the latest Posix interpretation:
every expansion of an unset variable except $@ and $* will cause the
shell to exit.
o. Fixed a bug that caused double-quoted expansions of $* inside word
expansions like ${x#$*} to not expand properly when $IFS is empty.
p. Fixed a bug that caused traps to set $LINENO to the wrong value when they
execute.
q. Fixed a bug that caused off-by-one errors when computing history lines in
the `fc' builtin.
r. Fixed a bug that caused some terminating signals to not exit the shell
quickly enough, forcing the kernel to send the signal (e.g., SIGSEGV)
multiple times.
s. Fixed a bug that caused the shell to attempt to add empty lines to the
history list when reading here documents.
t. Made some internal changes that dramatically speeds up sequential indexed
array access.
u. Fixed a bug that caused the shell to write past the end of a string when
completing a double-quoted string ending in a backslash.
v. Fixed a bug that caused the shell to replace too many characters when a
pattern match was null in a ${foo//bar} expansion.
w. Fixed bugs in the expansion of ** that caused duplicate directory names
and the contents of the current directory to be omitted.
x. Fixed a bug that caused $? to not be set correctly when referencing an
unset variable with set -u and set -e enabled.
y. Fixed a bug caused by executing an external program from the DEBUG trap
while a pipeline was running. The effect was to disturb the pipeline
state, occasionally causing it to hang.
z. Fixed a bug that caused the ** glob expansion to dump core if it
encountered an unsearchable directory.
aa. Fixed a bug that caused `command -v' and `command -V' to not honor the
path set by the -p option.
bb. Fixed a bug that caused brace expansion to take place too soon in some
compound array assignments.
cc. Fixed a bug that caused programmable completion functions' changes to
READLINE_POINT to not be reflected back to readline.
dd. Fixed a bug that caused the shell to dump core if a trap was executed
during a shell assignment statement.
ee. Fixed an off-by-one error when computing the number of positional
parameters for the ${@:0:n} expansion.
ff. Fixed a problem with setting COMP_CWORD for programmable completion
functions that could leave it set to -1.
gg. Fixed a bug that caused the ERR trap to be triggered in some cases where
`set -e' would not have caused the shell to exit.
hh. Fixed a bug that caused changes made by `compopt' to not persist past the
completion function in which compopt was executed.
ii. Fixed a bug that caused the list of hostname completions to not be cleared
when HOSTNAME was unset.
jj. Fixed a bug that caused variable expansion in here documents to look in
any temporary environment.
kk. Bash and readline can now convert file names between precomposed and
decomposed Unicode on Mac OS X ("keyboard" and file system forms,
respectively). This affects filename completion (using new
rl_filename_rewrite_hook), globbing, and readline redisplay.
ll. The ERR and EXIT traps now see a non-zero value for $? when a parser
error after set -e has been enabled causes the shell to exit.
mm. Fixed a bug that in brace expansion that caused zero-prefixed terms to
not contain the correct number of digits.
nn. Fixed a bug that caused the shell to free non-allocated memory when
unsetting an associative array which had had a value implicitly assigned
to index "0".
oo. Fixed a memory leak in the ${!prefix@} expansion.
pp. Fixed a bug that caused printf to not correctly report all write errors.
qq. Fixed a bug that caused single and double quotes to act as delimiters
when splitting a command line into words for programmable completion.
rr. Fixed a bug that caused ** globbing that caused **/path/* to match every
directory, not just those matching `path'.
ss. Fixed a bug that caused the shell to dump core when running `help' without
arguments if the terminal width was fewer than 7 characters.
2. Changes to Readline
a. The SIGWINCH signal handler now avoids calling the redisplay code if
one arrives while in the middle of redisplay.
b. Changes to the timeout code to make sure that timeout values greater
than one second are handled better.
c. Fixed a bug in the redisplay code that was triggered by a prompt
containing invisible characters exactly the width of the screen.
d. Fixed a bug in the redisplay code encountered when running in horizontal
scroll mode.
e. Fixed a bug that prevented menu completion from properly completing
filenames.
f. Fixed a redisplay bug caused by a multibyte character causing a line to
wrap.
g. Fixed a bug that caused key sequences of two characters to not be
recognized when a longer sequence identical in the first two characters
was bound.
h. Fixed a bug that caused history expansion to be attempted on $'...'
single-quoted strings.
i. Fixed a bug that caused incorrect redisplay when the prompt contained
multibyte characters in an `invisible' sequence bracketed by \[ and
\].
j. Fixed a bug that caused history expansion to short-circuit after
encountering a multibyte character.
3. New Features in Bash
a. Here-documents within $(...) command substitutions may once more be
delimited by the closing right paren, instead of requiring a newline.
b. Bash's file status checks (executable, readable, etc.) now take file
system ACLs into account on file systems that support them.
c. Bash now passes environment variables with names that are not valid
shell variable names through into the environment passed to child
processes.
d. The `execute-unix-command' readline function now attempts to clear and
reuse the current line rather than move to a new one after the command
executes.
e. `printf -v' can now assign values to array indices.
f. New `complete -E' and `compopt -E' options that work on the "empty"
completion: completion attempted on an empty command line.
g. New complete/compgen/compopt -D option to define a `default' completion:
a completion to be invoked on command for which no completion has been
defined. If this function returns 124, programmable completion is
attempted again, allowing a user to dynamically build a set of completions
as completion is attempted by having the default completion function
install individual completion functions each time it is invoked.
h. When displaying associative arrays, subscripts are now quoted.
i. Changes to dabbrev-expand to make it more `emacs-like': no space appended
after matches, completions are not sorted, and most recent history entries
are presented first.
j. The [[ and (( commands are now subject to the setting of `set -e' and the
ERR trap.
k. The source/. builtin now removes NUL bytes from the file before attempting
to parse commands.
l. There is a new configuration option (in config-top.h) that forces bash to
forward all history entries to syslog.
m. A new variable $BASHOPTS to export shell options settable using `shopt' to
child processes.
n. There is a new confgure option that forces the extglob option to be
enabled by default.
o. New variable $BASH_XTRACEFD; when set to an integer bash will write xtrace
output to that file descriptor.
p. If the optional left-hand-side of a redirection is of the form {var}, the
shell assigns the file descriptor used to $var or uses $var as the file
descriptor to move or close, depending on the redirection operator.
q. The < and > operators to the [[ conditional command now do string
comparison according to the current locale.
r. Programmable completion now uses the completion for `b' instead of `a'
when completion is attempted on a line like: a $(b c.
s. Force extglob on temporarily when parsing the pattern argument to
the == and != operators to the [[ command, for compatibility.
t. Changed the behavior of interrupting the wait builtin when a SIGCHLD is
received and a trap on SIGCHLD is set to be Posix-mode only.
u. The read builtin has a new `-N nchars' option, which reads exactly NCHARS
characters, ignoring delimiters like newline.
4. New Features in Readline
a. New bindable function: menu-complete-backward.
b. In the vi insertion keymap, C-n is now bound to menu-complete by default,
and C-p to menu-complete-backward.
c. When in vi command mode, repeatedly hitting ESC now does nothing, even
when ESC introduces a bound key sequence. This is closer to how
historical vi behaves.
d. New bindable function: skip-csi-sequence. Can be used as a default to
consume key sequences generated by keys like Home and End without having
to bind all keys.
e. New application-settable function: rl_filename_rewrite_hook. Can be used
to rewite or modify filenames read from the file system before they are
compared to the word to be completed.
f. New bindable variable: skip-completed-text, active when completing in the
middle of a word. If enabled, it means that characters in the completion
that match characters in the remainder of the word are "skipped" rather
than inserted into the line.
g. The pre-readline-6.0 version of menu completion is available as
"old-menu-complete" for users who do not like the readline-6.0 version.
h. New bindable variable: echo-control-characters. If enabled, and the
tty ECHOCTL bit is set, controls the echoing of characters corresponding
to keyboard-generated signals.
i. New bindable variable: enable-meta-key. Controls whether or not readline
sends the smm/rmm sequences if the terminal indicates it has a meta key
that enables eight-bit characters.
COPYING.v2
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
The Free Software Foundation has exempted Bash from the requirement of
Paragraph 2c of the General Public License. This is to say, there is
no requirement for Bash to print a notice when it is started
interactively in the usual way. We made this exception because users
and standards expect shells not to print such messages. This
exception applies to any program that serves as a shell and that is
based primarily on Bash as opposed to other GNU software.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
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Finally, any free program is threatened constantly by software
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The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
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distributed under the terms of Sections 1 and 2 above on a medium
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c) Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
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The source code for a work means the preferred form of the work for
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If distribution of executable or object code is made by offering
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distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
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except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
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all its terms and conditions for copying, distributing or modifying
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infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
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may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
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any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
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It is not the purpose of this section to induce you to infringe any
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such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
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Foundation.
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NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
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WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
Appendix: How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) 19yy <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) 19yy name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.
NEWS-3.0
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This is a terse description of the new features added to bash-3.0 since
the release of bash-2.05b. As always, the manual page (doc/bash.1) is
the place to look for complete descriptions.
1. New Features in Bash
a. ANSI string expansion now implements the \x{hexdigits} escape.
b. There is a new loadable `strftime' builtin.
c. New variable, COMP_WORDBREAKS, which controls the readline completer's
idea of word break characters.
d. The `type' builtin no longer reports on aliases unless alias expansion
will actually be performed.
e. HISTCONTROL is now a colon-separated list of values, which permits
more extensibility and backwards compatibility.
f. HISTCONTROL may now include the `erasedups' option, which causes all lines
matching a line being added to be removed from the history list.
g. `configure' has a new `--enable-multibyte' argument that permits multibyte
character support to be disabled even on systems that support it.
h. New variables to support the bash debugger: BASH_ARGC, BASH_ARGV,
BASH_SOURCE, BASH_LINENO, BASH_SUBSHELL, BASH_EXECUTION_STRING,
BASH_COMMAND
i. FUNCNAME has been changed to support the debugger: it's now an array
variable.
j. for, case, select, arithmetic commands now keep line number information
for the debugger.
k. There is a new `RETURN' trap executed when a function or sourced script
returns (not inherited child processes; inherited by command substitution
if function tracing is enabled and the debugger is active).
l. New invocation option: --debugger. Enables debugging and turns on new
`extdebug' shell option.
m. New `functrace' and `errtrace' options to `set -o' cause DEBUG and ERR
traps, respectively, to be inherited by shell functions. Equivalent to
`set -T' and `set -E' respectively. The `functrace' option also controls
whether or not the DEBUG trap is inherited by sourced scripts.
n. The DEBUG trap is run before binding the variable and running the action
list in a `for' command, binding the selection variable and running the
query in a `select' command, and before attempting a match in a `case'
command.
o. New `--enable-debugger' option to `configure' to compile in the debugger
support code.
p. `declare -F' now prints out extra line number and source file information
if the `extdebug' option is set.
q. If `extdebug' is enabled, a non-zero return value from a DEBUG trap causes
the next command to be skipped, and a return value of 2 while in a
function or sourced script forces a `return'.
r. New `caller' builtin to provide a call stack for the bash debugger.
s. The DEBUG trap is run just before the first command in a function body is
executed, for the debugger.
t. `for', `select', and `case' command heads are printed when `set -x' is
enabled.
u. There is a new {x..y} brace expansion, which is shorthand for {x.x+1,
x+2,...,y}. x and y can be integers or single characters; the sequence
may ascend or descend; the increment is always 1.
v. New ksh93-like ${!array[@]} expansion, expands to all the keys (indices)
of array.
w. New `force_fignore' shopt option; if enabled, suffixes specified by
FIGNORE cause words to be ignored when performing word completion even
if they're the only possibilities.
x. New `gnu_errfmt' shopt option; if enabled, error messages follow the `gnu
style' (filename:lineno:message) format.
y. New `-o bashdefault' option to complete and compgen; if set, causes the
whole set of bash completions to be performed if the compspec doesn't
result in a match.
z. New `-o plusdirs' option to complete and compgen; if set, causes directory
name completion to be performed and the results added to the rest of the
possible completions.
aa. `kill' is available as a builtin even when the shell is built without
job control.
bb. New HISTTIMEFORMAT variable; value is a format string to pass to
strftime(3). If set and not null, the `history' builtin prints out
timestamp information according to the specified format when displaying
history entries. If set, bash tells the history library to write out
timestamp information when the history file is written.
cc. The [[ ... ]] command has a new binary `=~' operator that performs
extended regular expression (egrep-like) matching.
dd. `configure' has a new `--enable-cond-regexp' option (enabled by default)
to enable the =~ operator and regexp matching in [[ ... ]].
ee. Subexpressions matched by the =~ operator are placed in the new
BASH_REMATCH array variable.
ff. New `failglob' option that causes an expansion error when pathname
expansion fails to produce a match.
gg. New `set -o pipefail' option that causes a pipeline to return a failure
status if any of the processes in the pipeline fail, not just the last
one.
hh. printf builtin understands two new escape sequences: \" and \?.
ii. `echo -e' understands two new escape sequences: \" and \?.
jj. The GNU `gettext' package and libintl have been integrated; the shell's
messages can be translated into different languages.
kk. The `\W' prompt expansion now abbreviates $HOME as `~', like `\w'.
ll. The error message printed when bash cannot open a shell script supplied
as argument 1 now includes the name of the shell, to better identify
the error as coming from bash.
mm. A bug that caused here documents to not work if the directory the shell
used for the temporary files was not writable has been fixed.
nn. The parameter pattern removal and substitution expansions are now much
faster and more efficient when using multibyte characters.
oo. Fixed a bug in the `shift' builtin that could cause core dumps when
reporting an out-of-range argument.
pp. The `jobs', `kill', and `wait' builtins now accept job control notation
even if job control is not enabled.
qq. The historical behavior of `trap' that allows a missing `action' argument
to cause each specified signal's handling to be reset to its default is
now only supported when `trap' is given a single non-option argument.
2. New Features in Readline
a. History expansion has a new `a' modifier equivalent to the `g' modifier
for compatibility with the BSD csh.
b. History expansion has a new `G' modifier equivalent to the BSD csh `g'
modifier, which performs a substitution once per word.
c. All non-incremental search operations may now undo the operation of
replacing the current line with the history line.
d. The text inserted by an `a' command in vi mode can be reinserted with
`.'.
e. New bindable variable, `show-all-if-unmodified'. If set, the readline
completer will list possible completions immediately if there is more
than one completion and partial completion cannot be performed.
f. There is a new application-callable `free_history_entry()' function.
g. History list entries now contain timestamp information; the history file
functions know how to read and write timestamp information associated
with each entry.
h. Four new key binding functions have been added:
rl_bind_key_if_unbound()
rl_bind_key_if_unbound_in_map()
rl_bind_keyseq_if_unbound()
rl_bind_keyseq_if_unbound_in_map()
i. New application variable, rl_completion_quote_character, set to any
quote character readline finds before it calls the application completion
function.
j. New application variable, rl_completion_suppress_quote, settable by an
application completion function. If set to non-zero, readline does not
attempt to append a closing quote to a completed word.
k. New application variable, rl_completion_found_quote, set to a non-zero
value if readline determines that the word to be completed is quoted.
Set before readline calls any application completion function.
l. New function hook, rl_completion_word_break_hook, called when readline
needs to break a line into words when completion is attempted. Allows
the word break characters to vary based on position in the line.
m. New bindable command: unix-filename-rubout. Does the same thing as
unix-word-rubout, but adds `/' to the set of word delimiters.
NEWS-4.0
-138
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@@ -1,138 +0,0 @@
o When using substring expansion on the positional parameters, a starting
index of 0 now causes $0 to be prefixed to the list.
o There is a new variable, $BASHPID, which always returns the process id of
the current shell.
o There is a new `autocd' option that, when enabled, causes bash to attempt
to `cd' to a directory name that is supplied as the first word of a
simple command.
o There is a new `checkjobs' option that causes the shell to check for and
report any running or stopped jobs at exit.
o The programmable completion code exports a new COMP_TYPE variable, set to
a character describing the type of completion being attempted.
o The programmable completion code exports a new COMP_KEY variable, set to
the character that caused the completion to be invoked (e.g., TAB).
o The programmable completion code now uses the same set of characters as
readline when breaking the command line into a list of words.
o The block multiplier for the ulimit -c and -f options is now 512 when in
Posix mode, as Posix specifies.
o Changed the behavior of the read builtin to save any partial input received
in the specified variable when the read builtin times out. This also
results in variables specified as arguments to read to be set to the empty
string when there is no input available. When the read builtin times out,
it returns an exit status greater than 128.
o The shell now has the notion of a `compatibility level', controlled by
new variables settable by `shopt'. Setting this variable currently
restores the bash-3.1 behavior when processing quoted strings on the rhs
of the `=~' operator to the `[[' command.
o The `ulimit' builtin now has new -b (socket buffer size) and -T (number
of threads) options.
o There is a new `compopt' builtin that allows completion functions to modify
completion options for existing completions or the completion currently
being executed.
o The `read' builtin has a new -i option which inserts text into the reply
buffer when using readline.
o A new `-E' option to the complete builtin allows control of the default
behavior for completion on an empty line.
o There is now limited support for completing command name words containing
globbing characters.
o The `help' builtin now has a new -d option, to display a short description,
and a -m option, to print help information in a man page-like format.
o There is a new `mapfile' builtin to populate an array with lines from a
given file.
o If a command is not found, the shell attempts to execute a shell function
named `command_not_found_handle', supplying the command words as the
function arguments.
o There is a new shell option: `globstar'. When enabled, the globbing code
treats `**' specially -- it matches all directories (and files within
them, when appropriate) recursively.
o There is a new shell option: `dirspell'. When enabled, the filename
completion code performs spelling correction on directory names during
completion.
o The `-t' option to the `read' builtin now supports fractional timeout
values.
o Brace expansion now allows zero-padding of expanded numeric values and
will add the proper number of zeroes to make sure all values contain the
same number of digits.
o There is a new bash-specific bindable readline function: `dabbrev-expand'.
It uses menu completion on a set of words taken from the history list.
o The command assigned to a key sequence with `bind -x' now sets two new
variables in the environment of the executed command: READLINE_LINE_BUFFER
and READLINE_POINT. The command can change the current readline line
and cursor position by modifying READLINE_LINE_BUFFER and READLINE_POINT,
respectively.
o There is a new >>& redirection operator, which appends the standard output
and standard error to the named file.
o The parser now understands `|&' as a synonym for `2>&1 |', which redirects
the standard error for a command through a pipe.
o The new `;&' case statement action list terminator causes execution to
continue with the action associated with the next pattern in the
statement rather than terminating the command.
o The new `;;&' case statement action list terminator causes the shell to
test the next set of patterns after completing execution of the current
action, rather than terminating the command.
o The shell understands a new variable: PROMPT_DIRTRIM. When set to an
integer value greater than zero, prompt expansion of \w and \W will
retain only that number of trailing pathname components and replace
the intervening characters with `...'.
o There are new case-modifying word expansions: uppercase (^[^]) and
lowercase (,[,]). They can work on either the first character or
array element, or globally. They accept an optional shell pattern
that determines which characters to modify. There is an optionally-
configured feature to include capitalization operators.
o The shell provides associative array variables, with the appropriate
support to create, delete, assign values to, and expand them.
o The `declare' builtin now has new -l (convert value to lowercase upon
assignment) and -u (convert value to uppercase upon assignment) options.
There is an optionally-configurable -c option to capitalize a value at
assignment.
o There is a new `coproc' reserved word that specifies a coprocess: an
asynchronous command run with two pipes connected to the creating shell.
Coprocs can be named. The input and output file descriptors and the
PID of the coprocess are available to the calling shell in variables
with coproc-specific names.
o A value of 0 for the -t option to `read' now returns success if there is
input available to be read from the specified file descriptor.
o CDPATH and GLOBIGNORE are ignored when the shell is running in privileged
mode.
o New bindable readline functions shell-forward-word and shell-backward-word,
which move forward and backward words delimited by shell metacharacters
and honor shell quoting.
o New bindable readline functions shell-backward-kill-word and shell-kill-word
which kill words backward and forward, but use the same word boundaries
as shell-forward-word and shell-backward-word.
NEWS-4.1
-105
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@@ -1,105 +0,0 @@
o Here-documents within $(...) command substitutions may once more be
delimited by the closing right paren, instead of requiring a newline.
o Bash's file status checks (executable, readable, etc.) now take file
system ACLs into account on file systems that support them.
o Bash now passes environment variables with names that are not valid
shell variable names through into the environment passed to child
processes.
o The `execute-unix-command' readline function now attempts to clear and
reuse the current line rather than move to a new one after the command
executes.
o `printf -v' can now assign values to array indices.
o New `complete -E' and `compopt -E' options that work on the "empty"
completion: completion attempted on an empty command line.
o New complete/compgen/compopt -D option to define a `default' completion:
a completion to be invoked on command for which no completion has been
defined. If this function returns 124, programmable completion is
attempted again, allowing a user to dynamically build a set of completions
as completion is attempted by having the default completion function
install individual completion functions each time it is invoked.
o When displaying associative arrays, subscripts are now quoted.
o Changes to dabbrev-expand to make it more `emacs-like': no space appended
after matches, completions are not sorted, and most recent history entries
are presented first.
o The [[ and (( commands are now subject to the setting of `set -e' and the
ERR trap.
o The source/. builtin now removes NUL bytes from the file before attempting
to parse commands.
o There is a new configuration option (in config-top.h) that forces bash to
forward all history entries to syslog.
o A new variable $BASHOPTS to export shell options settable using `shopt' to
child processes.
o There is a new confgure option that forces the extglob option to be
enabled by default.
o New variable $BASH_XTRACEFD; when set to an integer bash will write xtrace
output to that file descriptor.
o If the optional left-hand-side of a redirection is of the form {var}, the
shell assigns the file descriptor used to $var or uses $var as the file
descriptor to move or close, depending on the redirection operator.
o The < and > operators to the [[ conditional command now do string
comparison according to the current locale.
o Programmable completion now uses the completion for `b' instead of `a'
when completion is attempted on a line like: a $(b c.
o Force extglob on temporarily when parsing the pattern argument to
the == and != operators to the [[ command, for compatibility.
o Changed the behavior of interrupting the wait builtin when a SIGCHLD is
received and a trap on SIGCHLD is set to be Posix-mode only.
o The read builtin has a new `-N nchars' option, which reads exactly NCHARS
characters, ignoring delimiters like newline.
o The mapfile/readarray builtin no longer stores the commands it invokes via
callbacks in the history list.
o There is a new `compat40' shopt option.
o The < and > operators to [[ do string comparisons using the current locale
only if the compatibility level is greater than 40 (set to 41 by default).
o New bindable readline function: menu-complete-backward.
o In the readline vi-mode insertion keymap, C-n is now bound to menu-complete
by default, and C-p to menu-complete-backward.
o When in readline vi command mode, repeatedly hitting ESC now does nothing,
even when ESC introduces a bound key sequence. This is closer to how
historical vi behaves.
o New bindable readline function: skip-csi-sequence. Can be used as a
default to consume key sequences generated by keys like Home and End
without having to bind all keys.
o New bindable readline variable: skip-completed-text, active when
completing in the middle of a word. If enabled, it means that characters
in the completion that match characters in the remainder of the word are
"skipped" rather than inserted into the line.
o The pre-readline-6.0 version of menu completion is available as
"old-menu-complete" for users who do not like the readline-6.0 version.
o New bindable readline variable: echo-control-characters. If enabled, and
the tty ECHOCTL bit is set, controls the echoing of characters
corresponding to keyboard-generated signals.
o New bindable readline variable: enable-meta-key. Controls whether or not
readline sends the smm/rmm sequences if the terminal indicates it has a
meta key that enables eight-bit characters.
ddd1
-135
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@@ -1,135 +0,0 @@
*** ../bash-20101015/redir.c 2009-09-17 10:04:18.000000000 -0400
--- redir.c 2010-11-06 13:38:22.000000000 -0400
***************
*** 63,73 ****
extern int posixly_correct;
extern REDIRECT *redirection_undo_list;
extern REDIRECT *exec_redirection_undo_list;
/* Static functions defined and used in this file. */
- static void add_undo_close_redirect __P((int));
static void add_exec_redirect __P((REDIRECT *));
static int add_undo_redirect __P((int, enum r_instruction, int));
static int expandable_redirection_filename __P((REDIRECT *));
static int stdin_redirection __P((enum r_instruction, int));
--- 63,74 ----
extern int posixly_correct;
+ extern int last_command_exit_value;
extern REDIRECT *redirection_undo_list;
extern REDIRECT *exec_redirection_undo_list;
/* Static functions defined and used in this file. */
static void add_exec_redirect __P((REDIRECT *));
static int add_undo_redirect __P((int, enum r_instruction, int));
+ static int add_undo_close_redirect __P((int));
static int expandable_redirection_filename __P((REDIRECT *));
static int stdin_redirection __P((enum r_instruction, int));
***************
*** 94,97 ****
--- 95,105 ----
static int heredoc_errno;
+ #define REDIRECTION_ERROR(r, e) \
+ if ((r) != 0) \
+ { \
+ last_command_exit_value = EXECUTION_FAILURE;\
+ return ((e) == 0 ? EINVAL : (e));\
+ }
+
void
redirection_error (temp, error)
***************
*** 814,820 ****
/* Only setup to undo it if the thing to undo is active. */
if ((fd != redirector) && (fcntl (redirector, F_GETFD, 0) != -1))
! add_undo_redirect (redirector, ri, -1);
else
! add_undo_close_redirect (redirector);
}
--- 822,829 ----
/* Only setup to undo it if the thing to undo is active. */
if ((fd != redirector) && (fcntl (redirector, F_GETFD, 0) != -1))
! r = add_undo_redirect (redirector, ri, -1);
else
! r = add_undo_close_redirect (redirector);
! REDIRECTION_ERROR (r, errno);
}
***************
*** 919,925 ****
/* Only setup to undo it if the thing to undo is active. */
if ((fd != redirector) && (fcntl (redirector, F_GETFD, 0) != -1))
! add_undo_redirect (redirector, ri, -1);
else
! add_undo_close_redirect (redirector);
}
--- 928,935 ----
/* Only setup to undo it if the thing to undo is active. */
if ((fd != redirector) && (fcntl (redirector, F_GETFD, 0) != -1))
! r = add_undo_redirect (redirector, ri, -1);
else
! r = add_undo_close_redirect (redirector);
! REDIRECTION_ERROR(r, errno);
}
***************
*** 973,979 ****
/* Only setup to undo it if the thing to undo is active. */
if (fcntl (redirector, F_GETFD, 0) != -1)
! add_undo_redirect (redirector, ri, redir_fd);
else
! add_undo_close_redirect (redirector);
}
#if defined (BUFFERED_INPUT)
--- 983,990 ----
/* Only setup to undo it if the thing to undo is active. */
if (fcntl (redirector, F_GETFD, 0) != -1)
! r = add_undo_redirect (redirector, ri, redir_fd);
else
! r = add_undo_close_redirect (redirector);
! REDIRECTION_ERROR(r, errno);
}
#if defined (BUFFERED_INPUT)
***************
*** 1047,1052 ****
}
if ((flags & RX_UNDOABLE) && (fcntl (redirector, F_GETFD, 0) != -1))
! add_undo_redirect (redirector, ri, -1);
#if defined (COPROCESS_SUPPORT)
--- 1058,1065 ----
}
+ r = 0;
if ((flags & RX_UNDOABLE) && (fcntl (redirector, F_GETFD, 0) != -1))
! r = add_undo_redirect (redirector, ri, -1);
! REDIRECTION_ERROR (r, errno);
#if defined (COPROCESS_SUPPORT)
***************
*** 1165,1169 ****
/* Set up to close FD when we are finished with the current command
and its redirections. */
! static void
add_undo_close_redirect (fd)
int fd;
--- 1178,1182 ----
/* Set up to close FD when we are finished with the current command
and its redirections. */
! static int
add_undo_close_redirect (fd)
int fd;
***************
*** 1178,1181 ****
--- 1191,1196 ----
closer->next = redirection_undo_list;
redirection_undo_list = closer;
+
+ return 0;
}
doc/b.html
-15448
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File diff suppressed because it is too large Load Diff
fdprintf.c
-66
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@@ -1,66 +0,0 @@
/* fdprintf -- printf to a file descriptor
Copyright (C) 2008 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#if !HAVE_FDPRINTF
#include <stdc.h>
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#if defined (PREFER_STDARG)
# include <stdarg.h>
#else
# include <varargs.h>
#endif
#include <stdio.h>
int
#if defined (PREFER_STDARG)
fdprintf(int fd, const char *format, ...)
#else
fdprintf(fd, format, va_alist)
int fd;
const char *format;
va_dcl
#endif
{
FILE *fp;
int rc, r2;
va_list args;
fp = fdopen (dup (fd), "w");
if (fp == 0)
return -1;
SH_VA_START (args, format);
rc = vfprintf (fp, fmt, ap);
fflush (fp);
va_end (args);
r2 = fclose (fp); /* check here */
return rc;
}
#endif
lib/readline/copyright-comment
-12
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@@ -1,12 +0,0 @@
Readline is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Readline is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Readline. If not, see <http://www.gnu.org/licenses/>.
lib/readline/copyright-history
-12
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@@ -1,12 +0,0 @@
History is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
History is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with History. If not, see <http://www.gnu.org/licenses/>.
parse.y.yacc
-5726
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File diff suppressed because it is too large Load Diff
tests/run-histexpand.debug
-4
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@@ -1,4 +0,0 @@
echo "warning: all of these tests will fail if history has not been compiled" >&2
echo "warning: into the shell" >&2
${THIS_SH} +o histexpand ./histexp.tests > /tmp/xx 2>&1
diff /tmp/xx histexp.right && rm -f /tmp/xx